# coding:utf8
from bs4 import BeautifulSoup
import re
import urlparse

class HtmlParser(object):
	
	def parse(self, page_url, html_cont):
		if page_url is None or html_cont is None:
			return 
		soup = BeautifulSoup(html_cont,'html.parser',from_encoding='utf-8')
		new_urls = self._get_new_urls(page_url, soup)
		new_data = self._get_new_data(page_url, soup)
		return new_urls,new_data
	
	def _get_new_urls(self,page_url,soup):
		new_urls = set()
		links = soup.find_all('a', href=re.compile(r'/view/\d+\.htm'))
		for link in links:
			new_url = link['href']
			new_full_url = urlparse.urljoin(page_url,new_url)
			new_urls.add(new_full_url)
		return new_urls
		
	def _get_new_data(self,page_url,soup):
		res_data = {}
		res_data['url'] = page_url
		#<dd class="lemmaWgt-lemmaTitle-title"><h1>Python</h1>
		title_node = soup.find('dd', class_='lemmaWgt-lemmaTitle-title').find('h1')
		res_data['title'] = title_node.get_text()
		
		#<div class="lemma-summary" label-module="lemmaSummary">
		summary_node = soup.find('div', class_='lemma-summary')
		res_data['summary'] = summary_node.get_text()
		
		return res_data
	
	
	